When unadapted to ketosis the body can excrete up to 100 kcal of ketones: As a side note, urinary and breath excretion of acetone is negligible in terms of caloric loss, amounting to a maximum of 100 calories per day (2).
Mate selection may also be a factor associated with bilateral symmetry in humans. A December 2005 article by health and environmental reporting expert, Ker Than, reports on an experiment that indicated women are more attracted to men that have more symmetrical features.
Symmetry (noun). a due proportion of the several parts of a body to each other; adaptation of the form or dimensions of the several parts of a thing to each other; the union and conformity of the members of a work to the whole. Symmetry (noun).